Methodology for Measuring the In Vitro Seating and Unseating Forces of Prefabricated Attachment Systems Used to Retain Implant Overdentures

Fakhry, Ali; Tan, Swee-Chian; Heiner, Anneliese D.; Dehkordi-Vakil, Farideh; Dircks, Herb W.

doi:10.1111/j.1532-849x.2009.00525.x

Cited by 8 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, they had a loss of retention force over time that was in contrast to our findings. 20 They obtained an increase in the mean value of the retention force in the first 500 cycles, but at 2000 cycles, they obtained a value of 5 N. Fakhry et al 21 obtained increases in the initial mean values of retention forces, followed by a gradual decrease over 10000 cycles. A minimum change in the mean value of the retention force was found at an angulation of 20° between the attachments and the abutments did not have a negative effect on the retention force.…”

Section: Discussionmentioning

confidence: 98%

Effect of abutment angulation in the retention and durability of three overdenture attachment systems: Anin vitrostudy

Aroso¹,

Silva²,

Ustrell

et al. 2016

J Adv Prosthodont

View full text Add to dashboard Cite

PURPOSEThis in vitro study investigated and compared the durability and retention of three types of attachments.MATERIALS AND METHODSThree commercially available attachments were investigated: Clix®, Dalbo-Plus® and Locator®. In total, 72 samples of these attachments were placed in the acrylic resin forms and subjected to mechanical testing (5400 cycles of insertion and removal) over the respective ball or Locator abutments immersed in artificial saliva at pH 7 and 37℃. The abutments were placed at angulations of 0°, 10° and 20°. The retention force was recorded at the beginning and after 540, 1080, 2160, 3240, 4320 and 5400 insertion-removal cycles.RESULTSThe results revealed that there were significant differences in the average values of the insertion/removal force due to angulation (F (2.48) = 343619, P<.05) and the type of attachment (F (7.48) = 23.220, P<.05).CONCLUSIONGreater angulation of the abutments was found to influence the retention capacity of the attachments, and the fatigue test simulating 5 years of denture insertion and removal did not produce wear in the metal abutments.

show abstract

Section: Discussionmentioning

confidence: 98%

Effect of abutment angulation in the retention and durability of three overdenture attachment systems: Anin vitrostudy

Aroso¹,

Silva²,

Ustrell

et al. 2016

J Adv Prosthodont

View full text Add to dashboard Cite

show abstract

“…The purpose of this in vitro study was to investigate the possible effect of repeated separation and reunion cycles on the retention of paired overdenture stud attachment assemblies set in acrylic resin. The present results are compared to those reported in other studies [9][10][11][12][13][14], providing some insight into these concerns and the major factors involved. …”

mentioning

confidence: 52%

“…While a large increase in the seating/unseating force was observed during the first 300 cycles, no significant difference was found between the initial and final values of seating/unseating force, suggesting that use of substantially more than the 1000 testing cycles would not have altered the results of the present study. Although one limitation of this study was its in vitro nature, with ambient conditions and the absence of a lubricant, this protocol has also been followed in some of the recent studies [10][11][12][13][14] of overdenture retention. Two of these investigations have employed artificial saliva at room temperature [11] or water at 37°C [12] for the testing environments.…”

Section: Resultsmentioning

confidence: 99%

“…Although one limitation of this study was its in vitro nature, with ambient conditions and the absence of a lubricant, this protocol has also been followed in some of the recent studies [10][11][12][13][14] of overdenture retention. Two of these investigations have employed artificial saliva at room temperature [11] or water at 37°C [12] for the testing environments. To date no investigation of overdenture retention after a large number of separating/ reuniting cycles has fully compared the effects of testing temperature (ambient or intraoral) and testing environment (dry vs. wet: water or artificial saliva).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

In Vitro Study of Retention of Paired Press-Stud Overdenture Component Attachments

Fathalah

Byrne

Claffey

et al. 2017

JDHODT

View full text Add to dashboard Cite

For paired press-stud overdenture attachments from one manufacturer, there was no difference in retention force when the attachments were parallel or tilted (one at vertical angle of 15°), after approximately one year of simulated separating/reuniting cycles by a patient. The parallel attachments showed greater retention after periodic tightening than the tilted attachments. IntroductionThe mandibular two-implant overdenture has become a widely used restoration for edentulous patients, and the success of this type of restoration has been documented [1][2][3][4]. However, there has been a report of high failure rate of the retentive components used in these restorations, which seems to be related to their repeated use [5]. For example, concerns have been expressed about the effect of wear between components of the commonly used Bona-type stud attachments [6]. There have also been concerns that the relative angulation of these components may affect their rate of wear [7][8][9]. The purpose of this in vitro study was to investigate the possible effect of repeated separation and reunion cycles on the retention of paired overdenture stud attachment assemblies set in acrylic resin. The present results are compared to those reported in other studies [9][10][11][12][13][14], providing some insight into these concerns and the major factors involved. Material and Methods Test modelTwo cylindrical blocks of acrylic resin (Vari-Set 20, Met Prep Ltd, Coventry, UK), approximately 36 mm in diameter, were constructed. One end on each block was cut flat and polished (Met Prep PH Machine). For the first set (Group 1) of 10 test specimens, two analogues for stud attachments (ITI ® Straumann) were secured vertically in one acrylic block, 22 mm from the center and along a diameter line, with the aid of a surveyor (Bachman ® Parallelometer, Cendres & Metaux, Switzerland), as shown in Figure 1. A second set (Group 2) of 10 specimens was assembled in the same manner, except one attachment was set vertically and the second was set at a 15° angle toward it, as shown in Figure 2. The attachments for the stud assemblies of both Groups 1 and 2 were secured to the other acrylic block, using the same material. A removable square metal rod was fastened to the second acrylic block and fit into corresponding square tubing in the first block, serving as a guidance rod for seating during the separation and reunion cycling. A nut was incorporated in the upper acrylic AbstractStatement of problem: Loss of retention of implant overdenture stud attachment assemblies presents maintenance problems to both the patient and dentist.Purpose: The purpose of this in vitro study was to investigate effects of repeated separation and reunion cycles on retention of paired overdenture stud attachment assemblies set in acrylic resin. Material and methods:Ten pairs of stud attachments were set vertically and parallel to each other (Group 1). Ten other pairs of stud attachments were set with one vertical and the other at a vertical angle of 15°, so that it converged...

show abstract

“…It is noteworthy that a minimal reduction in retentive force was achieved by the magnetic attachments[ 46 47 ] compared to the gradual decrease of the stud attachments’ retention. [ 48 ] When tested under identical conditions, less physical deterioration was found, despite microscopic corrosion signs observed within the stainless steel magnet case. [ 19 26 ]…”

Section: Methodsmentioning

confidence: 99%

Biomaterial aspects: A key factor in the longevity of implant overdenture attachment systems

Daou

2015

J Int Soc Prevent Communit Dent

View full text Add to dashboard Cite

Background:New attachment systems are released for mandibular two-implant overdentures often without evidence-based support. Biomaterial aspects are now the parameters considered when choosing the appropriate attachment. Studies regarding their properties remain scarce.Purpose:The purpose of this review was to help the clinician in selrcting the most adapted stud attachments according evidence-based dentistry.Materials and Methods:An electronic search was conducted using specific databases (PubMed, Medline, and Elsevier libraries). Peer-reviewed articles published in English up to July 2014 were identified. Emphasis was given on the biomaterial aspects and technical complications. No hand search was added.Results:The electronic search generated 115 full-text papers, of which 84 papers were included in the review. The majority were clinical and in vitro studies. Some review articles were also considered. Papers reported survival and failures of overdenture connection systems. Emphasis was laid on attachment deformation.Conclusion:Implant overdentures long-term follow-up studies may provide useful guidelines for the clinician in selecting the type of attachment system and overdenture design. Locator attachments are more and more used, with lesser complications reported.

show abstract

Methodology for Measuring the In Vitro Seating and Unseating Forces of Prefabricated Attachment Systems Used to Retain Implant Overdentures

Abstract: Spherical stud attachments exhibited consistent seating and unseating forces over 10,000 cycles. A 20 degrees angle between the patrix and matrix had no effect on the overall seating and unseating force values.

Cited by 8 publications

References 20 publications

Effect of abutment angulation in the retention and durability of three overdenture attachment systems: Anin vitrostudy

Effect of abutment angulation in the retention and durability of three overdenture attachment systems: Anin vitrostudy

In Vitro Study of Retention of Paired Press-Stud Overdenture Component Attachments

Biomaterial aspects: A key factor in the longevity of implant overdenture attachment systems

Contact Info

Product

Resources

About